Uxcell 420Pack M3-0.5x30/35/40/45/50mm Button Head Socket Cap Screws - Carbon Steel Bolt Nut Set Washer Assortment Kit & Wrench - Good for Road Bicycle, Mountain Bike, Auto

Material - Constructed with Carbon Steel material with Black Oxide treatment, these button hex socket cap screws bolts nuts assortment kit of stronger durability, have a bright appearance, are not easier to deform or corrode and have a long service life than others surface finishes.

Feature - The button socket head cap screw is designed with an inner hex drive style and pan head, providing a higher torque and clamping force, as well as offering a wider bearing surface and high tensile strength.

Application - Good replacement parts and construction fasteners for cars, bicycles, communication equipment, and ship assembly.

Notice - The screw bolt kits are packed in a durable box, to avoid making a mess, the box is clearly labeled so that you can quickly identify the size you need by the label.